https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65475
--- Comment #5 from Jan Hubicka <hubicka at ucw dot cz> --- Hmm, yeah, in one unit base is virutal and in other it is not. Perhaps just dropping that sanity check or restricting it to non-odr-violation-reported.... Honza > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65475 > > --- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> --- > Unfortunately, there is another problem with applied patch: > > $ cat 1.ii > namespace std { > class exception {}; > class runtime_error : exception { > virtual char m_fn1(); > } a; > } > > $ cat 2.ii > namespace std { > class exception { > virtual char m_fn1(); > }; > class runtime_error : exception { > } a; > } > > $ g++ 1.ii 2.ii -flto -O1 > /home/marxin/Programming/bin/gcc/bin/ld: error: /tmp/cc7v39VO.o: multiple > definition of 'std::a' > /home/marxin/Programming/bin/gcc/bin/ld: /tmp/ccJ8pPM4.o: previous definition > here > 2.ii:2:7: warning: type ???struct exception??? violates one definition rule > [-Wodr] > class exception { > ^ > 1.ii:2:7: note: a type with different virtual table pointers is defined in > another translation unit > class exception {}; > ^ > 2.ii:2:7: warning: type ???struct exception??? violates one definition rule > [-Wodr] > class exception { > ^ > 1.ii:2:7: note: a type with different bases is defined in another translation > unit > class exception {}; > ^ > 1.ii:3:7: warning: type ???struct runtime_error??? violates one definition > rule > [-Wodr] > class runtime_error : exception { > ^ > 2.ii:5:7: note: a type with different virtual table pointers is defined in > another translation unit > class runtime_error : exception { > ^ > lto1: internal compiler error: in add_type_duplicate, at ipa-devirt.c:1575 > 0x77c43c add_type_duplicate > ../../gcc/ipa-devirt.c:1573 > 0x77c43c get_odr_type(tree_node*, bool) > ../../gcc/ipa-devirt.c:1772 > 0x77d25c register_odr_type(tree_node*) > ../../gcc/ipa-devirt.c:1848 > 0x5b43d6 lto_read_decls > ../../gcc/lto/lto.c:1946 > 0x5b4d7b lto_file_finalize > ../../gcc/lto/lto.c:2236 > 0x5b4d7b lto_create_files_from_ids > ../../gcc/lto/lto.c:2246 > 0x5b4d7b lto_file_read > ../../gcc/lto/lto.c:2287 > 0x5b4d7b read_cgraph_and_symbols > ../../gcc/lto/lto.c:2992 > 0x5b4d7b lto_main() > ../../gcc/lto/lto.c:3462 > > > Thanks, > Martin > > -- > You are receiving this mail because: > You are on the CC list for the bug. > You are the assignee for the bug.
